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MYB Factors: Hubs of Plant Stress and Hormone Crosstalk
Aye Aye Htun1, Ya Wang1, Jiahao Liu1
1State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping/CIMMYT-China Wheat and Maize Joint Research Center/Agronomy College, Henan Agricultural University, Zhengzhou, China.
Abstract:
MYB transcription factors function as main regulatory hubs that integrate environmental signals with multi-hormonal pathways to synchronize plant growth, metabolism and stress responses. This review delineates the regulatory roles of MYB in the signalling pathway of salicylic acid, jasmonic acid, ethylene and abscisic acid signalling. These are responsible for regulating hormone biosynthesis and facilitating interaction between biotic and abiotic stress responses. The post-translational regulation of MYB activity by kinase cascades and the direct regulation of secondary metabolic pathways, such as the biosynthesis of phenylpropanol and lignin, by MYBs through the MYB-bHLH-WD40 (MBW) complex were investigated. MYB transcription factors located at the intersection of hormone signalling, metabolic regulation, and developmental regulation play a unique role in coordinating plant adaptation from the cellular level to the whole plant.
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